| Nick Lewycky | ca55ee0 | 2009-10-14 19:02:13 +0000 | [diff] [blame] | 1 | ; RUN: opt -gvn -instcombine -S < %s | FileCheck %s |
| Kenneth Uildriks | b908f8a | 2009-11-03 15:29:06 +0000 | [diff] [blame] | 2 | target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128" |
| Nick Lewycky | 5c9be67 | 2009-10-13 07:48:38 +0000 | [diff] [blame] | 3 | |
| 4 | declare i8 @llvm.atomic.load.add.i8.p0i8(i8*, i8) |
| 5 | |
| Nick Lewycky | ca55ee0 | 2009-10-14 19:02:13 +0000 | [diff] [blame] | 6 | define i8 @foo(i8* %ptr) { |
| Nick Lewycky | 5c9be67 | 2009-10-13 07:48:38 +0000 | [diff] [blame] | 7 | %P = getelementptr i8* %ptr, i32 0 |
| 8 | %Q = getelementptr i8* %ptr, i32 1 |
| 9 | ; CHECK: getelementptr |
| 10 | %X = load i8* %P |
| Nick Lewycky | 5c9be67 | 2009-10-13 07:48:38 +0000 | [diff] [blame] | 11 | %Y = call i8 @llvm.atomic.load.add.i8.p0i8(i8* %Q, i8 1) |
| 12 | %Z = load i8* %P |
| 13 | ; CHECK-NOT: = load |
| Nick Lewycky | ca55ee0 | 2009-10-14 19:02:13 +0000 | [diff] [blame] | 14 | %A = sub i8 %X, %Z |
| 15 | ret i8 %A |
| 16 | ; CHECK: ret i8 0 |
| Nick Lewycky | 5c9be67 | 2009-10-13 07:48:38 +0000 | [diff] [blame] | 17 | } |